Question about 1990 Honda CB 1

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Hello i have problems when i reath 5500 rpm in every gear i have change the top gasket and new sparkplugs the fuel pump is cheket to. hope i can get some help

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  • Michael Thorpe
    Michael Thorpe May 11, 2010

    whats the problem then? please tell us and we may be able to help you



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It sounds like it could be an air intake or carb problem. I would make sure the air filter is clean, and the air box is completely in place around the carbs. If that doesn't fix it, next time you ride, when it starts to cut out, choke it and see if it picks up. If so, you need to clean the carbs. Hope this helps

Posted on Dec 30, 2009


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Only wants to stay running at high rpm' s put in gear it dies .smells like its getting to much gas,

try to choke air at carburetor a little bit until it stall if rpm go up or running better then you have a vacuum leak ,or carburetor rebuild
hope it helps

Mar 22, 2014 | 1979 Chevrolet Camaro

1 Answer

Fuel problems

When it stalls out, remove both fuel filters and drain them into a measuring can. Take measuring can and see if contents fill even 1 filter. Then you will know if the filters are running dry and the engine is fuel starved.
It kinda sounds like you are losing fuel draw. As RPM climbs, the draw can not keep up above idle. Could be that fuel pump is playing out.
Other consideration is that problems are in high gear where RPM drops after advancing through gear range. Could be that there is a problem with the Crankshaft counter failing to Cue enough fuel for a load at Low RPM.
Think that experimenting with Downshifting or disengaging Overdrive when engine bogs, may provide clue.
Also check if engine has EGR, some only work in top gear, and as Diesels have Vacuum pumps, a failure could create stalling if EGR leaks.

Jun 02, 2013 | 2011 Ford F-250 Super Duty

1 Answer

Bike bogs and back fired when i gear. not in nuteral though

Hi, Put new sparkplugs in and then see how it runs. My guess is that you have a bad plug(s). Good luck.

Aug 19, 2012 | 1994 Yamaha FZR 1000

1 Answer

Chrysler 318 V8 Engine After it warms up in gear at med. RPM it will miss and die. Runs fine in neutral. Have changed carb., fuel pump, alternator, coil and electric iginition. Could it be cam or? There is...

I imagine you changed fuel filters and the screens inside the fuel line when you changed carbs. Does each engine have its own fuel tank?

It sounds like a cracked sparkplug. I do not see that you changed plugs. Then while you are changing the plugs you can see how they are firing. You may have 1 bad sparkplug wire if the plug is wet. Wires and cracked plugs tend to Arc with higher voltage from the increased RPM.

You can also use a vacuum gauge and see if the valves are sealing or if a valve spring is not closing the valve for smooth operation. If the vacuum readings are low, check the intake for a vacuum leak. This should also help diagnose rough cam lobes.

Jun 21, 2010 | Boating

1 Answer

When going down the road it there is a slight rpm change like the ac compressor is running but the ac an fan are both turned off if i take it out of overdrive an put it into 3rd gear the rpm increases like...

Not likely fuel related.
The ignition is not firing properly.
maybe the sparkplug wires
ignition module (or distributor/rotor)
ECM (Electronic control module).

Oct 05, 2009 | Office Equipment & Supplies

1 Answer

Ford Escape goes dead

You started the right way.
It sounds like it needs a tune-up.
Change the sparkplugs - Use Autolite Platinum ($3.87 for two at WalMart; $6 each at AutoZone)

Also, check for faulty sparkplug cables as follows:
1. When it is getting dark outside, set the parking/emergency brake.
2. Open the hood.
3. Start the car and look under hood for "sparks" from the sparkplug cables to the engine (or other metal part).
4. DON'T TOUCH anything under the hood! The cables can shock you (bad!) or the fan can cut you or the Boogeyman may reach out ... (sorry)...
5. Turn off car .. that ends the cable spark test.
6. Replace ALL sparkplug cables if any create a light show under the hood.

Hope this helps!
(It's the plugs)

Sep 08, 2009 | 2005 Ford Escape

1 Answer

I have a 70 hp Johnson outboard that revs up just fine, but when I engage the drive, 18000 rps is all I can get out of it before the motor dies. I just had a busted piston ring replaced and a new head...

If you have paid someone to do the work, take it back.
If the motor was cleaned during repair the fuel pump may be bad from the solvent. If it was just a case of low rpm it could be timing or adjustments, but to kill the engine sounds like fuel starvation or water in the head from a leaking head gasket. Check your sparkplugs and see if they look normal.

Jul 20, 2009 | Boating

1 Answer

How do you put in a fuel pump for a thunderbird

Easy enough fix to do yourself. There are 2 bolts that hold the fuel pump onto the engine. Remove and plug the fuel lines. Remove the 2 bolts holding the pump to the engine. Remove pump and pull towards you to clear the engine and remove. Remove the fittings to replace them on new pump. Match your new pump to your old pump and make sure the fittings are in the same locale. Replace the rubber hoses. Attach the gasket to the pump with adhesive. Slide the pump into place making sure the actuator arm is under the eccentric. Replace the bolts, hook up the fuel lines, and test. Make sure you have no leaks.
dziglar; make sure the metal lines are not cross-threaded, or over tight to crack housing.
Hope this helps; Thanks and please rate me high;
RPM Northwest

Jun 08, 2008 | 1983 Ford Thunderbird

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